Number of promissory notes assumed

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- Definition

Number of shares issued for convertible debt that is converted.

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- Definition

Default amount of convertible reclassified to current liabilities as all principal and unpaid interest is immediately due in cash upon event of default.

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- Definition

Represents threshold maturity days after a qualified financing for convertible notes if not converted.

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- Definition

Represents threshold maturity period from the issuance date for convertible notes if not converted, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

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- Definition

Amount of debt final payment fees.

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- Definition

Represents the per share and warrants in one unit.

+ References

No definition available.

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- Definition

The cash outflow to repay the interest amount of long-term debt.

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- Definition

The value of the financial instrument(s) that the original debt is being converted into in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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- Definition

The number of shares issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or payments in the period.

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- Definition

The number of warrants issued in exchange for the original debt being converted in a noncash (or part noncash) transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

+ References

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- Definition

The price per share of the conversion feature embedded in the debt instrument.

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- Definition

Face (par) amount of debt instrument at time of issuance.

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

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Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Debt - Pre 2019 convertible notes (Details) $ / shares in Units, $ in Thousands					12 Months Ended
	Dec. 28, 2020 USD ($) shares	Dec. 23, 2020 USD ($)	Dec. 19, 2019 USD ($) shares	Jan. 13, 2019 USD ($) D $ / shares shares	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($) shares	Feb. 28, 2020 USD ($) NotesSeries	Dec. 31, 2018 USD ($)	Jul. 20, 2018 USD ($) NotesSeries
Debt Instrument [Line Items]
Amount borrowed			$ 3,000
Interest rate (stated)			3.00%
Warrants issued on conversion \| shares			403,101
Debt issuance costs					$ 29	$ 746
Amount outstanding					47,983	49,461
Loss on extinguishment of debt					5,748	(483)
Original debt amount					1,436	$ 34,105
Series B Redeemable Convertible Preferred Stock
Debt Instrument [Line Items]
Warrants issued on conversion \| shares						70,408
Pre-2019 Convertible Promissory Notes
Debt Instrument [Line Items]
Amount borrowed				$ 7,324			$ 1,400	$ 16,600	$ 1,689
Interest rate (stated)				4.50%					3.50%
Shares issued on conversion \| shares	198,750			1,173,473
Warrants issued on conversion \| shares	73,538			70,408
Shares issuable on conversion \| shares				537,024
Conversion price (per unit) \| $ / shares				$ 14.79
Shares /Warrants per unit				0.06
Number of promissory notes assumed \| NotesSeries							1		2
Debt issuance costs				$ 356
Default amount reclassified					$ 7,288
Unpaid interest		$ 48
Loss on extinguishment of debt	$ 247	285
Interest amount		289
Original debt amount	$ 1,153
Maturity days threshold for notes if not converted \| D				10
Maturity period threshold for notes if not converted					3 years
Pre-2019 Convertible Promissory Notes \| Maximum
Debt Instrument [Line Items]
Interest rate (stated)				10.00%
Pre-2019 Convertible Promissory Notes \| Minimum
Debt Instrument [Line Items]
Interest rate (stated)				8.00%
2018 Convertible Promissory Notes \| Maximum
Debt Instrument [Line Items]
Interest rate (stated)				10.00%
Merger Agreement \| Pre-2019 Convertible Promissory Notes
Debt Instrument [Line Items]
Amount outstanding		7,317
Unpaid interest		$ 516